Open hole well reentry method and system, electronic equipment and storage medium

Abstract

The invention provides an open hole reentry method and system, electronic equipment and a storage medium, and relates to the technical field of open hole disposal, and the method comprises the steps that the spatial position coordinates of a target object in a target well are obtained through a trail-touch borehole reentry subsystem; according to the spatial position coordinates of the target object in the target well, performing trial collision on the target object through the trial collision borehole re-entry subsystem; under the condition that the trial collision borehole reentry subsystem touches the target object, the drilling angle of the trial collision borehole reentry subsystem is changed, and drilling is conducted again; and monitoring whether at least one of drilling tool emptying, bit pressure continuous drop and drilling fluid instantaneous consumption increase occurs or not, and determining that the trail-touch borehole re-entry subsystem re-enters the target well under the condition that at least one of drilling tool emptying, bit pressure continuous drop and drilling fluid instantaneous consumption increase occurs. And accurate trial collision positioning is carried out on the target object, it is guaranteed that open hole well reentry is smoothly and stably carried out, and the open hole well reentry efficiency and quality can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of open hole well disposal, and in particular to an open hole well re-entry method, system, electronic equipment and storage medium. Background Art

[0002] With the accelerated transformation of global energy supply to low carbon and carbon emission reduction, the demand for natural gas as a transitional energy source is growing, and the country's natural gas storage capacity is constantly increasing. Underground gas storage is an artificial gas field or gas reservoir formed by re-injecting natural gas extracted from natural gas fields into underground gas storage space. It is currently the world's most important natural gas storage method and peak-shaving means, and is an important carrier to ensure the long-term and stable supply of natural gas. However, for some developed depleted gas reservoirs or oil and gas reservoirs converted into gas storage, due to geological or engineering reasons in the early development, such as downhole debris, drill stuck, serious leakage, and no oil and gas display in the target layer, abandoned open hole wells were formed. It may uncover the cap layer of the gas reservoir, connect the gas reservoir, and destroy the sealing of the entire geological body. If not handled, it will bring great difficulties to the long-term safe and stable operation and risk control of the gas storage. Therefore, in the process of converting oil and gas reservoirs into underground gas storage, it is urgent to plug and dispose of abandoned open hole wells to solve the bottleneck problem of reservoir construction.

[0003] At present, in the process of plugging and treating old wells in gas storage reservoirs, most of them use squeezed ultra-fine cement to plug the perforated sections of the old wells, thereby achieving the plugging of the gas reservoir. However, abandoned side-drilled open-hole wells are usually plugged with cement plugs on the original open-hole fishtail or the upper part of the open-hole section, and windows are opened for side drilling. The target well has no squeezed cement channel, that is, it is impossible to use conventional old well plugging methods to seal the fishtail, the cap layer below the cement plug, and the gas reservoir, which poses a serious safety hazard to the construction of underground gas storage.

[0004] Therefore, a method for open hole well re-entry is urgently needed. Summary of the invention

[0005] In view of the above problems, embodiments of the present application provide a method, system, electronic device and storage medium for re-entry into an open hole well, so as to overcome the above problems or at least partially solve the above problems.

[0006] In a first aspect of an embodiment of the present application, a method for re-entering a bare hole well is provided, the method comprising:

[0007] The spatial position coordinates of the target object in the target well are obtained by trial-hitting the wellbore reentry subsystem;

[0008] According to the spatial position coordinates of the target object in the target well, the target object is tested by the test wellbore re-entry subsystem;

[0009] When the trial wellbore re-entry subsystem touches the target object, the drilling angle of the trial wellbore re-entry subsystem is changed to re-drill;

[0010] Monitor whether at least one of the following occurs: the drilling tool is emptied, the drilling pressure continues to drop, and the instantaneous consumption of drilling fluid increases. If at least one of the following occurs: the drilling tool is emptied, the drilling pressure continues to drop, and the instantaneous consumption of drilling fluid increases, determine that the trial wellbore re-entry subsystem re-enters the target well.

[0011] Optionally, after determining that the trial wellbore re-entry subsystem re-enters the target well, the method further includes:

[0012] Controlling the trial wellbore re-entry subsystem to stop drilling, and withdrawing the trial wellbore re-entry subsystem from the operating well;

[0013] The probing and reaming subsystem is lowered into the working well, and the wellbore drilled by the trial wellbore re-entry subsystem is reamed by the probing and reaming subsystem.

[0014] Optionally, after the trial wellbore re-entry subsystem touches the target object, the method further includes:

[0015] Controlling the trial wellbore re-entry subsystem to stop drilling, and withdrawing the trial wellbore re-entry subsystem from the operating well;

[0016] A cement plug is injected into the first target well section in the working well to backfill the working well.

[0017] Optionally, in the case where the target object is a fallen fish, the step of obtaining the spatial position coordinates of the target object in the target well by trial-hitting the wellbore reentry subsystem includes:

[0018] The trajectory data, gravity field data and magnetic field signal of the fish falling in the working well are measured by the trial wellbore re-entry subsystem;

[0019] Determine a first relative distance between the fish landing and the trial wellbore re-entry subsystem according to the magnetic field signal, and determine a first relative orientation between the fish landing and the trial wellbore re-entry subsystem according to the gravity field data;

[0020] The spatial position coordinates of the fallen fish are determined according to the first relative distance, the first relative orientation and the trajectory data.

[0021] Optionally, in the case where the target object is a cement plug, the step of obtaining the spatial position coordinates of the target object in the target well by trial-hitting the wellbore re-entry subsystem includes:

[0022] The trajectory data and gravity field data of the operating well and the casing magnetic field signal in the target well are measured by the trial wellbore re-entry subsystem;

[0023] Determine a second relative distance between the casing and the trial borehole re-entry subsystem according to the magnetic field signal, and determine a second relative orientation between the fish and the trial borehole re-entry subsystem according to the gravity field data;

[0024] determining the spatial position coordinates of the casing according to the second relative distance, the second relative orientation and the trajectory data;

[0025] The spatial position coordinates of the cement plug are determined according to the spatial position coordinates of the casing and based on the pre-stored relative positions of the casing and the cement plug.

[0026] Optionally, the method further comprises:

[0027] In the case that any one of the drilling tool emptying, the continuous decrease of the drilling pressure, and the increase of the instantaneous consumption of the drilling fluid is not detected, the trial wellbore re-entry subsystem is controlled to drill along a trajectory parallel to the target well to obtain a parallel well parallel to the trajectory of the target well;

[0028] Directed perforating is performed on the parallel wells to connect the target well with the parallel wells;

[0029] Ultrafine cement is injected into the parallel wells, so that the ultrafine cement flows from the parallel wells into the target well through the perforation channels of the target well and the parallel wells.

[0030] Optionally, after the wellbore drilled by the trial wellbore re-entry subsystem is enlarged by the percussion enlarging subsystem, the method further comprises:

[0031] Controlling the drilling and reaming subsystem to stop drilling, and withdrawing the drilling and reaming subsystem from the operating well;

[0032] A casing is run into the working well and cementing is performed.

[0033] In a second aspect of the embodiment of the present application, there is provided a bare hole well re-entry system for implementing the method as described in the first aspect of the embodiment of the present application, the system comprising: a trial wellbore re-entry subsystem;

[0034] The trial borehole re-entry subsystem comprises: a first drill pipe, a first non-magnetic drill collar, a non-magnetic source while drilling steering subsection, a while drilling gyro subsection, a first while drilling measurement subsection, a power drilling tool and a first drill bit connected in sequence.

[0035] Optionally, the system further comprises: a punching and reaming subsystem;

[0036] The percussion and reaming subsystem comprises: a second drill pipe, a second non-magnetic drill collar, a second measurement while drilling short section, a third non-magnetic drill collar, a stabilizer, a check valve, a screw drill tool and a second drill bit which are connected in sequence.

[0037] Optionally, the system further comprises: a surface injection control subsystem;

[0038] The surface injection control subsystem comprises: an onshore injection vehicle, an instrument panel, an injection device, an onshore drilling platform and a derrick injection head which are connected in sequence.

[0039] According to a third aspect of an embodiment of the present application, an electronic device is provided, including a memory, a processor, and a computer program stored on the memory, wherein the processor executes the computer program to implement the open hole well re-entry method described in the first aspect of an embodiment of the present application.

[0040] According to a fourth aspect of the embodiments of the present application, a computer-readable storage medium is provided, on which a computer program / instruction is stored. When the computer program / instruction is executed by a processor, the open hole well re-entry method as described in the first aspect of the embodiments of the present application is implemented.

[0041] Beneficial effects of the embodiments of the present application:

[0042] The embodiment of the present application provides a method for reentering an open hole well, the method comprising: obtaining the spatial position coordinates of a target object in a target well through a trial wellbore reentry subsystem; performing a trial collision on the target object through the trial wellbore reentry subsystem according to the spatial position coordinates of the target object in the target well; changing the drilling angle of the trial wellbore reentry subsystem and re-drilling when the trial wellbore reentry subsystem touches the target object; monitoring whether at least one of the following occurs: a drilling tool is emptied, the drilling pressure continues to drop, and the instantaneous consumption of drilling fluid increases, and determining that the trial wellbore reentry subsystem reenters the target well when at least one of the following occurs: a drilling tool is emptied, the drilling pressure continues to drop, and the instantaneous consumption of drilling fluid increases. The present application uses the trial wellbore reentry subsystem to perform precise trial collision positioning on the target object according to the spatial position coordinates of the downhole target object, thereby ensuring smooth and stable reentry of the open hole well, and helping to improve the efficiency and quality of reentry of the open hole well. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0044] Figure 1 It is a schematic diagram of the steps of a method for re-entry into an open hole provided in an embodiment of the present application;

[0045] Figure 2 It is a flowchart of a fish-dropping open hole well re-entry method provided in an embodiment of the present application;

[0046] Figure 3 It is a flowchart of a cement plug type open hole well re-entry method provided in an embodiment of the present application;

[0047] Figure 4 It is a schematic diagram of the system structure of a surface injection control subsystem and a trial wellbore re-entry subsystem provided in an embodiment of the present application;

[0048] Figure 5 It is a schematic diagram of the system structure of a ground injection control subsystem and a perforation and expansion subsystem provided in an embodiment of the present application;

[0049] Figure 6 It is a schematic diagram of the system structure of another ground injection control subsystem and a perforation and expansion subsystem provided in an embodiment of the present application;

[0050] Figure 7 It is a schematic diagram of an electronic device provided in an embodiment of the present application.

[0051] Explanation of the reference numerals in the accompanying drawings: 1. Onshore injection vehicle; 2. Instrument panel; 3. Injection device; 4. Onshore drilling platform; 5. Derrick injection head; 6. First drill pipe; 7. First non-magnetic drill collar; 8. Non-magnetic source while drilling guide short section; 9. While drilling gyro short section; 10. First while drilling short section; 11. Power drilling tool; 12. First drill bit; 13. Target; 14. Second drill pipe; 15. Second non-magnetic drill collar; 16. Second while drilling short section; 17. Third non-magnetic drill collar; 18. Stabilizer; 19. Check valve; 20. Screw drilling tool; 21. Second drill bit. DETAILED DESCRIPTION

[0052] The exemplary embodiments of the present application will be described in more detail below in conjunction with the accompanying drawings in the embodiments of the present application. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to enable the scope of the present application to be fully communicated to those skilled in the art.

[0053] In a first aspect of the present application, a method for re-entering a bare hole well is provided. Figure 1 FIG. 1 is a schematic diagram of a process flow of a method for re-entering a bare hole provided in an embodiment of the present application, wherein the method comprises:

[0054] Step S101, obtaining the spatial position coordinates of the target object in the target well by trial-hitting the wellbore reentry subsystem;

[0055] Specifically, the spatial position coordinates of the target object in the target well are obtained through the trial wellbore re-entry subsystem. In an embodiment of the present application, the trial wellbore re-entry subsystem can be used to first conduct a large-scale search for the target object, and after determining the approximate range of the target object, the spatial position coordinates of the target object can be accurately located.

[0056] In a preferred embodiment, when the target object is a fallen fish, the step of obtaining the spatial position coordinates of the target object in the target well by the trial wellbore reentry subsystem includes:

[0057] The trajectory data, gravity field data and magnetic field signal of the fish falling in the working well are measured by the trial wellbore re-entry subsystem;

[0058] Determine a first relative distance between the fish landing and the trial wellbore re-entry subsystem according to the magnetic field signal, and determine a first relative orientation between the fish landing and the trial wellbore re-entry subsystem according to the gravity field data;

[0059] The spatial position coordinates of the fallen fish are determined according to the first relative distance, the first relative orientation and the trajectory data.

[0060] Specifically, after the ground workers install the trial wellbore re-entry subsystem, the trial wellbore re-entry subsystem is lowered into the working well, and the trajectory data of the working well is obtained through the trial wellbore re-entry subsystem, and the historical trajectory data of the target well is used as a reference for anti-collision scanning. When the distance between the working well and the target well is greater than or equal to the first target distance, in this embodiment, the first target distance can be 5m, and when the current magnetic field strength BT and geomagnetic inclination DIP measured by the trial wellbore re-entry subsystem differ from the local magnetic field strength and the standard value of the geomagnetic inclination by less than ±1%, the trial wellbore re-entry subsystem continues to detect and control the drilling trajectory to approach the target well for drilling until the trial wellbore re-entry subsystem measures that the distance between the working well and the target well is less than the first target distance, and when the current magnetic field strength BT and geomagnetic inclination DIP values ​​are measured to differ from the local magnetic field strength and the standard value of the geomagnetic inclination by more than ±1%, the large-scale search for fallen fish is terminated.

[0061] Furthermore, the spatial coordinates of the fish are precisely located by the borehole reentry subsystem. Specifically, the trajectory data and gravity field data of the operating well are measured and obtained by the borehole reentry subsystem, and at the same time, the magnetic field signal of the fish is measured, wherein the trajectory data of the operating well may be the well inclination data and azimuth data of the operating well.

[0062] According to the signal strength of the magnetic field signal of the fish, the first relative distance between the test wellbore reentry subsystem and the fish can be calculated. According to the measured gravity field data of the working well, the first relative orientation of the fish can be calculated, and further, according to the first relative distance between the test wellbore reentry subsystem and the fish, the first relative orientation and the trajectory data of the working well, the spatial position coordinates of the fish can be obtained through inversion calculation.

[0063] In another preferred embodiment, when the target object is a cement plug, the step of obtaining the spatial position coordinates of the target object in the target well by the trial wellbore re-entry subsystem includes:

[0064] The trajectory data and gravity field data of the operating well and the casing magnetic field signal in the target well are measured by the trial wellbore re-entry subsystem;

[0065] Determine a second relative distance between the casing and the trial borehole re-entry subsystem according to the magnetic field signal, and determine a second relative orientation between the fish and the trial borehole re-entry subsystem according to the gravity field data;

[0066] determining the spatial position coordinates of the casing according to the second relative distance, the second relative orientation and the trajectory data;

[0067] The spatial position coordinates of the cement plug are determined according to the spatial position coordinates of the casing and based on the pre-stored relative positions of the casing and the cement plug.

[0068] Specifically, after the ground operators install the trial wellbore re-entry subsystem, they lower the trial wellbore re-entry subsystem into the operating well, and measure the trajectory data and gravity field data of the operating well through the trial wellbore re-entry subsystem, where the trajectory data of the operating well can be the well inclination data and azimuth data of the operating well. At the same time, the magnetic field signal of the wellbore casing in the target well is measured through the trial wellbore re-entry subsystem.

[0069] Furthermore, the spatial position coordinates of the cement plug are precisely located by the trial wellbore re-entry subsystem. The second relative distance of the wellbore casing relative to the trial wellbore re-entry subsystem is calculated based on the signal strength of the magnetic field signal of the wellbore casing measured; the second relative orientation of the wellbore casing relative to the trial wellbore re-entry subsystem is calculated based on the measured gravity field data of the operating well; and the spatial position coordinates of the wellbore casing are further obtained by inversion calculation based on the second relative distance and second relative orientation of the wellbore casing and the trial wellbore re-entry subsystem and the trajectory data of the operating well.

[0070] Furthermore, the spatial position coordinates of the cement plug are calculated based on the spatial position coordinates of the wellbore casing and in combination with the relative positions of the wellbore casing and the cement plug.

[0071] Step S102, performing a trial collision with the target object through the trial collision wellbore re-entry subsystem according to the spatial position coordinates of the target object in the target well;

[0072] In this step, after determining the spatial position coordinates of the target object in the target well, a trial collision is performed on the target object through the trial collision wellbore re-entry subsystem based on the spatial position coordinates of the target object.

[0073] Specifically, the trial borehole reentry subsystem uses the spatial position coordinates of the target object in the target well as a reference for drilling to test the target object. When at least one of the following conditions is detected: the trial borehole reentry subsystem is stuck, the torque suddenly increases, and the debris of the target object appears in the returned debris, it is determined that the trial borehole reentry subsystem has successfully tried to touch the target object. It should be noted that if the trial borehole reentry subsystem fails to touch the target object for the first time, the drilling angle of the trial borehole reentry subsystem will continue to be finely controlled according to the spatial position coordinates of the target object until the trial borehole reentry subsystem touches the target object, that is, until the trial touch is successful.

[0074] Step S103, when the trial wellbore re-entry subsystem touches the target object, the drilling angle of the trial wellbore re-entry subsystem is changed to re-drill;

[0075] Specifically, in this step, when the trial wellbore re-entry subsystem touches the target object, the trial wellbore re-entry subsystem is controlled to stop drilling, and the trial wellbore re-entry subsystem is withdrawn from the operating well, and then the drilling angle of the trial wellbore re-entry subsystem is changed to resume drilling.

[0076] In a preferred embodiment, after the trial wellbore re-entry subsystem is withdrawn from the operating well, a certain amount of cement plug can be injected into the first target well section in the operating well, i.e., the well section in the operating well where the fish is tested, and then the trial wellbore re-entry subsystem is re-lowered into the operating well. When the trial wellbore re-entry subsystem drills to the cement plug, the drilling angle of the trial wellbore re-entry subsystem is changed to implement side drilling, and a parallel well parallel to the target well trajectory is drilled, and finally the target well is re-entered at the bottom of the target object at a drilling angle that differs from the well inclination data of the target well by less than 2°.

[0077] This embodiment uses a backfill sidetracking process of injecting cement plugs into the well section of the working well that is in contact with the fish landing test, which can effectively avoid the trajectory space of the working well and the target well being separated after crossing and causing the two to stagger with each other.

[0078] Step S104, monitors whether at least one of the drill string is emptied, the drilling pressure continues to drop, and the instantaneous consumption of drilling fluid increases, and determines that the trial wellbore re-entry subsystem re-enters the target well when at least one of the drill string is emptied, the drilling pressure continues to drop, and the instantaneous consumption of drilling fluid increases is monitored.

[0079] Specifically, the trial wellbore re-entry subsystem monitors the downhole situation in real time. If at least one of the following situations is detected: the drill bit is drained, the drilling pressure continues to drop, and the instantaneous consumption of drilling fluid increases, it can be determined that the trial wellbore re-entry subsystem has successfully re-entered the target well. In actual applications, if the above phenomena are not detected, the drilling angle is continuously adjusted until the trial wellbore re-entry subsystem successfully re-enters the target well.

[0080] In a preferred embodiment of the present application, when no one of the drilling tool emptying, the continuous decrease of the drilling pressure, and the increase of the instantaneous consumption of the drilling fluid is detected, the trial wellbore re-entry subsystem is controlled to drill along a trajectory parallel to the target well, so as to obtain a parallel well parallel to the trajectory of the target well;

[0081] Directed perforating is performed on the parallel wells to connect the target well with the parallel wells;

[0082] Ultrafine cement is injected into the parallel wells, so that the ultrafine cement flows from the parallel wells into the target well through the perforation channels of the target well and the parallel wells.

[0083] Specifically, in this embodiment, if in the process of continuous monitoring of the downhole conditions, any of the following conditions, namely, the emptying of the drill bit, the continuous decrease in the drilling pressure, and the increase in the instantaneous consumption of the drilling fluid, has not been detected, the trial wellbore re-entry subsystem is controlled to drill along a trajectory parallel to the target well, thereby obtaining a parallel well parallel to the trajectory of the target well.

[0084] After obtaining a parallel well parallel to the target well, the trial wellbore re-entry subsystem is controlled to exit the parallel well, casing is run into the parallel well and cemented, and then a directional perforating tool is run to perform directional perforation of the parallel well, so that the target well can be connected with the parallel well, and then ultrafine cement is injected into the parallel well, and the ultrafine cement is squeezed into the target well through qualitative perforation, so as to achieve the plugging of the target well.

[0085] In a specific embodiment, it is assumed that Well C is an old well with a fish-dropping type side-drilling. The target well is drilled through the caprock, and the fish drop is located at 794m-2418m. There are both gas storage layers and non-gas storage layers in the open hole section below the fish drop. In order to prevent the gas from rising from the gas storage reservoir, the target well must be effectively blocked to ensure the sealing and operation safety of the gas reservoir. For a newly drilled operating well, a trial wellbore reentry subsystem is used to detect the spatial position of the fish drop. When the well is drilled to a depth of 2275m-2280m, it intersects with the trajectory of the target well. The drilling speed increases, and rust and iron filings are returned from the vibrating screen. The trial fish drop is successful. The drilling continues and the trajectory of the target well intersects for the second time. The number of iron filings returned increases. The two trial fish drops are successful, but they intersect and stagger with the trajectory of the target well. When drilling to 2435m below the fish drop, there is still no phenomenon of emptying and reentering the target well, and the target well cannot be successfully reentered. The trajectory is continuously adjusted and controlled by trial touching the non-magnetic source while drilling steering short section and the while drilling gyro short section in the wellbore re-entry subsystem, and the trajectory of the operating well is kept parallel to the trajectory of the target well. After forming a parallel well parallel to the target well, casing is lowered and cementing is performed, directional perforation is performed, and ultra-fine cement is squeezed to connect the target well and seal the gas storage layer. A pressure gauge is installed at the wellhead to complete the well.

[0086] In a preferred embodiment of the present application, after determining that the trial wellbore re-entry subsystem re-enters the target well, the method further includes:

[0087] Controlling the trial wellbore re-entry subsystem to stop drilling, and withdrawing the trial wellbore re-entry subsystem from the operating well;

[0088] The probing and reaming subsystem is lowered into the working well, and the wellbore drilled by the trial wellbore re-entry subsystem is reamed by the probing and reaming subsystem.

[0089] Specifically, in this embodiment, after the trial wellbore re-entry subsystem successfully re-enters the target well, the trial wellbore re-entry subsystem is controlled to stop drilling, and the trial wellbore re-entry subsystem is withdrawn from the operating well, and the ground operating personnel replace the trial wellbore re-entry subsystem with the exploration and expansion subsystem, and lower the exploration and expansion subsystem into the operating well.

[0090] Furthermore, the drilling and reaming subsystem conducts drilling and reaming of the wellbore based on the trajectory of the operating well until the drilling reaches the completed well depth of the target well. In practical applications, when drilling and reaming the wellbore, a small-sized drill bit can be used to conduct the first drilling and reaming of the wellbore, and after the first drilling and reaming of the wellbore is completed, the small-sized drill bit can be replaced with a large-sized drill bit for the second drilling and reaming of the wellbore. It is worth noting that both drilling and reaming of the wellbore need to be conducted to the completed well depth of the target well.

[0091] Furthermore, after the wellbore drilled by the trial wellbore re-entry subsystem is expanded by the probing and expanding subsystem, the method further comprises:

[0092] Controlling the drilling and reaming subsystem to stop drilling, and withdrawing the drilling and reaming subsystem from the operating well;

[0093] A casing is run into the working well and cementing is performed.

[0094] Specifically, after the reaming subsystem completes the reaming of the original wellbore, it is controlled to stop drilling and exit the operating well, and casing is lowered into the operating well to carry out cementing. After the cementing is completed, the cementing quality inspection is carried out to check whether the cementing quality requirements are met, and finally real-time pressure monitoring of the wellbore and wellhead is carried out.

[0095] In another embodiment of the present application, there is provided a Figure 2 The flowchart of the fish-dropping open hole well re-entry method is shown in FIG. Figure 2 As shown, the method includes:

[0096] S201, install the system. After the surface workers install the surface injection control subsystem, they are ready to carry out the current production wellbore treatment;

[0097] S202, Wellbore treatment. After installing the surface injection control subsystem, the ground operators will re-measure the wellbore inclination data of the existing production wellbore and conduct a wellbore pressure test, then inject cement to squeeze the gas reservoir and plug the existing production well;

[0098] S203, approaching the fish. After the ground operator installs the trial borehole reentry subsystem, the trial borehole reentry subsystem is lowered into the working well, and the trajectory data of the working well is obtained through the trial borehole reentry subsystem, and the historical trajectory data of the target well is used as a reference for anti-collision scanning. When the distance between the working well and the target well is greater than or equal to the first target distance, in this embodiment, the first target distance can be 5m, and the current magnetic field strength BT and geomagnetic inclination DIP measured by the trial borehole reentry subsystem differ from the local magnetic field strength and the standard value of the geomagnetic inclination by less than ±1%, the trial borehole reentry subsystem is continued to detect and control the drilling trajectory to approach the target well for drilling, until the trial borehole reentry subsystem measures that the distance between the working well and the target well is less than the first target distance, and the current magnetic field strength BT and geomagnetic inclination DIP values ​​measured differ from the local magnetic field strength and the standard value of the geomagnetic inclination by more than ±1%, the large-scale search for the fish is terminated.

[0099] S204, try to touch the fish. The trial wellbore re-entry subsystem uses the spatial position coordinates of the fish in the target well as a reference to perform drilling to try to touch the fish. When at least one of the following conditions is detected: a jerking of the trial wellbore re-entry subsystem, a sudden increase in torque, and the presence of fish debris in the returned debris, it is determined that the trial wellbore re-entry subsystem has successfully touched the fish. It should be noted that if the trial wellbore re-entry subsystem fails to touch the fish for the first time, the drilling angle of the trial wellbore re-entry subsystem will continue to be finely controlled according to the spatial position coordinates of the fish until the trial wellbore re-entry subsystem touches the fish, that is, until the trial touch is successful.

[0100] S205, backfilling the wellbore. When the trial wellbore reentry subsystem successfully collides with the fish in the well, the trial wellbore reentry subsystem is taken out. In order to avoid the two well trajectories intersecting in space and then separating and staggering the target well, a cement plug is injected into the well section of the wellbore where the fish is collided for a certain distance to backfill and sidetrack, thereby further controlling the wellbore trajectory;

[0101] S206, wellbore re-entry. After a certain amount of cement plug is injected into the well section of the working well where the fish is tested, the test wellbore re-entry subsystem is lowered back into the working well, and when the test wellbore re-entry subsystem drills to the cement plug, the drilling angle of the test wellbore re-entry subsystem is changed to implement sidetracking, and a parallel well is drilled parallel to the target well trajectory, and finally the target well is re-entered at the bottom of the target object at a drilling angle that differs from the well inclination data of the target well by less than 2°.

[0102] It is determined whether the trial wellbore reentry subsystem successfully reenters the target well, if so, the process proceeds to S207. If not, the process proceeds to S212.

[0103] S207, replacing the system. When the trial wellbore reentry subsystem successfully reenters the target well, the trial wellbore reentry subsystem is removed, and the scouring and expanding subsystem is lowered to the target well;

[0104] S208, open hole drilling. When the drilling and reaming subsystem is lowered into the target well, the drilling and reaming subsystem uses a small-sized drill bit to perform the first borehole drilling of the target well, until the drilling reaches the completion depth of the target well.

[0105] S209, replace the drill bit. When the drilling and reaming subsystem reaches the target well completion depth, remove the drilling and reaming subsystem, replace the drill bit with a larger size, and then lower the drilling and reaming subsystem into the target well;

[0106] S210, open hole reaming. After the drilling and reaming subsystem with a large-size drill bit is lowered into the original wellbore, a second wellbore drilling is performed according to the trajectory of the target well drilled;

[0107] S211, completion monitoring. When the reaming subsystem completes the reaming, remove the reaming subsystem, lower the casing and cementing, conduct cementing quality inspection, determine whether the cementing quality requirements are met, and finally install the annulus pressure monitoring equipment to monitor the wellbore and wellhead pressure in real time;

[0108] S212, drilling a parallel well. The wellbore trajectory is continuously controlled to approach the trajectory of the target well by the trial wellbore reentry subsystem, and a parallel well parallel to the trajectory of the target well is drilled;

[0109] S213, directional perforation. When the test wellbore re-entry subsystem drills a parallel well parallel to the trajectory of the target well, the test wellbore re-entry subsystem is removed, casing is lowered and cemented, and a directional perforation tool is lowered to perform directional perforation of the parallel well, so as to connect the parallel well with the target well;

[0110] S214, wellbore sealing. Inject ultrafine cement into the parallel well, squeeze the ultrafine cement into the target well through directional perforation, and perform cement sealing of the target well. Finally, install annular pressure monitoring equipment to perform real-time pressure monitoring of the wellbore and wellhead.

[0111] In a specific embodiment, it is assumed that Well A is an old sidetracked well. The drill bit was 215.9mm, and the drill bit got stuck when it reached a depth of 2633m, resulting in the abandonment of the wellbore. A fish with a length of about 1163m was left in the abandoned open hole. The fish top was 642m deep, and the fish bottom was 1804m deep. The abandoned wellbore was side-drilled with cement plug at a depth of 510m. The target well formed after side-drilling was a conventional development well. Cement was injected to plug the gas reservoir and the target well during the disposal of the old well. The abandoned target well penetrated the gas reservoir cap layer and the gas reservoir, which destroyed the sealing of the gas reservoir and did not meet the long-term safe operation requirements of the gas reservoir. For the newly drilled operating well, the trial wellbore reentry subsystem was used to continuously adjust the wellbore trajectory. The relative distance between the operating well and the target well was adjusted from 6.57m at 1148m to 0.32m at 1685m. Through the encrypted measurement and adjustment of the trial wellbore reentry subsystem, the trajectory gradually converged and the azimuth was gradually adjusted to match the spatial position of the fish drop. At this time, the drilling time increased from 3-6min / m to 12min / m. A large amount of iron filings were returned from the wellhead. The indoor element spectrum analysis determined that it was a G105 steel grade drill pipe, which was consistent with the nature of the fish drop. The fish drop was successful. After the side drilling of the filling hole, the fish drop drill was tracked parallel to the wellbore, accompanied by the fish drop to a well depth of 1808m, and re-entered the abandoned target well at a posture that intersected with the target well at a small angle. At this time, the emptying phenomenon was obvious, and 4m of drilling fluid was consumed instantly. 3. The φ190.5 small drill bit of the percussion and reaming subsystem was then used for open hole percussion, and the φ215.9mm drill bit was used for reaming. The trajectory of the operating well always fell within the target well until the well depth of 2633m was completed. After drilling, casing was lowered and cemented. The sealing quality of the caprock section was good, meeting the plugging requirements of the gas storage reservoir. A simple pressure gauge was installed to monitor the wellbore and wellhead pressure.

[0112] In another embodiment of the present application, there is provided a Figure 3 A flow chart of a cement plug open hole well re-entry method is shown in FIG. Figure 3 As shown, the method includes:

[0113] S301, install the system. After the surface workers install the surface injection control subsystem, they are ready to carry out the current production wellbore treatment;

[0114] S302, Wellbore treatment. After installing the surface injection control subsystem, the ground operators re-measure the wellbore inclination data of the existing production wellbore and conduct a wellbore pressure test, then inject cement to squeeze the gas storage layer and plug the existing production well.

[0115] S303, positioning the cement plug. The trajectory data and gravity field data of the operating well are measured by the trial wellbore re-entry subsystem, wherein the trajectory data of the operating well may be the well inclination data and azimuth data of the operating well. At the same time, the magnetic field signal of the wellbore casing in the target well is measured by the trial wellbore re-entry subsystem. Further, the spatial position coordinates of the cement plug are accurately positioned by the trial wellbore re-entry subsystem. According to the signal strength of the magnetic field signal of the wellbore casing measured, the second relative distance of the wellbore casing relative to the trial wellbore re-entry subsystem is calculated; according to the gravity field data of the operating well measured, the second relative orientation of the wellbore casing relative to the trial wellbore re-entry subsystem is calculated; and further, according to the second relative distance and the second relative orientation of the wellbore casing and the trial wellbore re-entry subsystem and the trajectory data of the operating well, the spatial position coordinates of the wellbore casing are obtained by inversion calculation. Further, according to the spatial position coordinates of the wellbore casing, the spatial position coordinates of the cement plug are calculated in combination with the relative position of the wellbore casing and the cement plug.

[0116] The trial wellbore reentry subsystem drills based on the spatial position coordinates of the cement plug in the target well to test the cement plug. When at least one of the following conditions is detected: the trial wellbore reentry subsystem is stuck, the torque suddenly increases, and cement plug debris appears in the returned debris, it is determined that the trial wellbore reentry subsystem has successfully tried to touch the cement plug. It should be noted that if the trial wellbore reentry subsystem fails to touch the cement plug for the first time, the drilling angle of the trial wellbore reentry subsystem will continue to be finely controlled according to the spatial position coordinates of the cement plug until the trial wellbore reentry subsystem touches the cement plug, that is, until the trial is successful.

[0117] S304, wellbore reentry. After the wellbore reentry subsystem successfully locates the cement plug and conducts a trial collision, it drills along the trajectory of the well section where the cement plug is located to the bottom of the cement plug to reenter the target well. Whether to reenter the target well is determined based on whether the drilling tool is emptied, whether the drilling pressure continues to decrease, and whether the instantaneous consumption of drilling fluid increases. If the above phenomena do not occur, the drilling trajectory is continuously adjusted to reenter the target well.

[0118] It is determined whether the trial wellbore reentry subsystem successfully reenters the target well, if so, the process proceeds to S305. If not, the process proceeds to S310.

[0119] S305, replace the system. When the trial wellbore reentry subsystem successfully reenters the target well, remove the trial wellbore reentry subsystem and lower the scouring and expanding subsystem to the target well;

[0120] S306, open hole drilling. When the drilling and reaming subsystem is lowered into the target well, the drilling and reaming subsystem uses a small-sized drill bit to perform the first borehole drilling of the target well, until the drilling reaches the completion depth of the target well.

[0121] S307, replace the drill bit. When the drilling and reaming subsystem reaches the target well completion depth, remove the drilling and reaming subsystem, replace the drill bit with a larger size, and then lower the drilling and reaming subsystem into the target well;

[0122] S308, open hole reaming. After the drilling and reaming subsystem with a large-size drill bit is lowered into the original wellbore, a second wellbore drilling is performed according to the trajectory of the target well drilled;

[0123] S309, completion monitoring. When the reaming subsystem completes the reaming, remove the reaming subsystem, lower the casing and cementing, conduct cementing quality inspection, determine whether the cementing quality requirements are met, and finally install the annulus pressure monitoring equipment to monitor the wellbore and wellhead pressure in real time;

[0124] S310, drilling a parallel well. The wellbore trajectory is continuously controlled to approach the trajectory of the target well by the trial wellbore reentry subsystem, and a parallel well parallel to the trajectory of the target well is drilled;

[0125] S311, directional perforation. When the test wellbore re-entry subsystem drills a parallel well parallel to the trajectory of the target well, the test wellbore re-entry subsystem is removed, casing is lowered and cemented, and a directional perforation tool is lowered to perform directional perforation of the parallel well, so as to connect the parallel well with the target well;

[0126] S312, wellbore sealing. Inject ultrafine cement into the parallel wells, squeeze the ultrafine cement into the target wells through directional perforation, and perform cement sealing of the target wells. Finally, install annular pressure monitoring equipment to perform real-time pressure monitoring of the wellbore and wellhead.

[0127] In a specific embodiment, it is assumed that Well B is an old well with cement plug sidetracking. The drill was drilled to 4650m with a 215.9mm drill bit. Because no good oil and gas show was found, the drill was side-drilled. Cement plugs were drilled in the 3400-3500m section of the wellbore. The drill was side-drilled at 3400m. The target well formed after side-drilling was cemented to plug the gas reservoir and the target well. The abandoned target well penetrated the cap layer, drilled to the reservoir, and was connected to the surrounding wells, so it had to be plugged. For the newly drilled operating well, the trial wellbore re-entry subsystem was used to continuously adjust the wellbore trajectory. The distance between the casing and the wellbore of the target well was adjusted from 10.5m to 0.26m. The cement plug was positioned. The elemental analysis of the rock cuttings returned at a depth of 3462m showed a calcium content of 18%. It was believed that the trial cement plug was successful at this depth. After drilling along the cement plug to the bottom of the cement plug, there was an instantaneous emptying and abnormal total hydrocarbon value, which confirmed that the target well was re-entered well. Later, a percussion and reaming subsystem was used, with a φ190.5mm drill bit for percussion and a φ215.9mm drill bit for reaming. The well was successfully drilled to a completion depth of 4,650m, after which casing was lowered for cementing, a pressure gauge was installed at the wellhead, and the well was completed, completing the re-entry and plugging treatment of the well.

[0128] In a second aspect of the embodiment of the present application, there is provided a system for re-entry of an open hole well, the system being used for real-time use of the method described in the first aspect of the embodiment of the present application, the system comprising: a trial wellbore re-entry subsystem;

[0129] The trial borehole re-entry subsystem comprises: a first drill pipe 6, a first non-magnetic drill collar 7, a non-magnetic source while drilling steering subsection 8, a while drilling gyro subsection 9, a first while drilling measurement subsection 10, a power drilling tool 11 and a first drill bit 12 connected in sequence.

[0130] In a preferred embodiment, the system further comprises: a punching and reaming subsystem;

[0131] The percussion and reaming subsystem includes: a second drill pipe 14, a second non-magnetic drill collar 15, a second measurement while drilling sub 16, a third non-magnetic drill collar 17, a stabilizer 18, a check valve 19, a screw drill 20 and a second drill bit 21 connected in sequence.

[0132] In a preferred embodiment, the system further comprises: a surface injection control subsystem;

[0133] The surface injection control subsystem comprises: an onshore injection vehicle 1, an instrument panel 2, an injection device 3, an onshore drilling platform 4 and a derrick injection head 5 which are connected in sequence.

[0134] In a preferred embodiment, Figure 4 A schematic diagram of the system structure of a surface injection control subsystem and a trial wellbore re-entry subsystem provided in an embodiment of the present application, Figure 5A schematic diagram of the system structure of a ground injection control subsystem and a perforation and expansion subsystem provided in an embodiment of the present application. Figure 6 A schematic diagram of the system structure of another surface injection control subsystem and a percussion and expansion subsystem provided in the embodiment of the present application is shown in FIG. Figure 4 , Figure 5 as well as Figure 6 The system structure diagram shown in the figure, the method for re-entry of a bare hole well described in the present application specifically includes:

[0135] After the ground operators have installed the ground injection control system, the onshore injection vehicle 1, the instrument panel 2, the injection device 3, the onshore drilling platform 4 and the derrick injection head 5 are connected in sequence. The ground operators can control the trial borehole re-entry subsystem through the instrument panel 2 to perform downhole trial operations. Specifically, the trajectory data of the operating well is obtained by controlling the first downhole measurement short section 10 of the trial borehole re-entry subsystem, and an anti-collision scan is performed based on the historical trajectory data of the target well. When the distance between the two wells is greater than 5m and the magnetic field strength BT and geomagnetic inclination DIP measured by the first downhole measurement short section 10 differ from the local magnetic field strength and geomagnetic inclination standard values ​​by less than ±1%, the trial borehole re-entry subsystem is continued to detect and control the trajectory to asymptotically approach the target well. If the distance between the two wells is less than 5m and the magnetic field strength BT and geomagnetic inclination DIP differ by more than ±1%, the large-scale search for the target object is terminated;

[0136] When the trial collision wellbore re-entry subsystem approaches the target object 13, the non-magnetic source while drilling steering subsection 8 and the while drilling gyro subsection 9 in the trial collision wellbore re-entry subsystem begin to precisely measure and control the wellbore trajectory, so as to achieve further approach and trial collision with the downhole target object 13. The while drilling gyro subsection 9 obtains the well inclination and azimuth data of the operating well, and the non-magnetic source while drilling steering subsection 8 measures the magnetic field signal of the target object 13 and the gravity field data of the operating well, calculates the relative distance of the target object 13 according to the magnetic field signal strength, calculates the relative azimuth of the target object 13 according to the gravity field data, and inverts and calculates the spatial position coordinates of the target object 13 according to the trajectory data of the operating well, the relative distance of the target object 13 and the relative azimuth, so as to achieve the spatial position positioning of the target object 13 and guide the operating well to trial collision with the target object 13. Whether the downhole target 13 is successfully collided is judged based on whether the borehole re-entry subsystem is stuck, the torque increases, and whether there are debris of the downhole target 13 in the returned cuttings. If the collision is not successful, continue to finely control the borehole trajectory through the non-magnetic source downhole steering short section 8 and the downhole gyro short section 9 to try to collide with the target 13 until the trial collision is successful.

[0137] When the trial wellbore reentry subsystem successfully collides with the downhole target 13, the trial wellbore reentry subsystem is taken out. In order to avoid the two well trajectories intersecting in space and then separating and staggering the target well, a cement plug is injected into the well section of the wellbore that is a distance from the collision target 13 to backfill and sidetrack, so as to further control the wellbore trajectory;

[0138] After the wellbore is backfilled with sidetracking cement plugs at a distance from the collision target 13, the trial wellbore re-entry subsystem is re-entered for sidetracking construction, and the wellbore trajectory is approached and controlled by the non-magnetic source while-drilling guide short section 8 and the while-drilling gyro short section 9, and a parallel well parallel to the target well trajectory is drilled, and the target well is re-entered at the bottom of the target object 13 with a posture that differs from the target well by less than 2°. Whether to re-enter the target well is determined based on whether the drilling tool is emptied, whether the drilling pressure continues to decrease, and whether the instantaneous consumption of drilling fluid increases. If the above phenomena do not occur, the wellbore trajectory is continuously adjusted to re-enter the target well;

[0139] When the trial wellbore re-entry subsystem successfully re-enters the target well, the trial wellbore re-entry subsystem is taken out, and the probing and reaming subsystem is lowered to the target well; when the probing and reaming subsystem is lowered to the target well, the trajectory is measured and controlled by the second measurement while drilling short section 16, and the target well is probed by the second drill bit 21 of the probing and reaming subsystem, which can be a small-sized drill bit, until the target well is probed to the completed drilling depth; when the probing and reaming subsystem is probed to the completed drilling depth of the original target well, the probing and reaming subsystem is taken out. The drilling subsystem is used to replace the small-sized drill bit with a large-sized drill bit, and then the drilling subsystem is lowered to the target well; when the drilling subsystem with a large-sized drill bit is lowered to the target well, the open hole is expanded according to the borehole trajectory of the original target well that was explored; when the drilling subsystem completes the expansion of the original target well, the drilling subsystem is taken out, the casing and cementing are lowered, and the cementing quality is tested to check whether the cementing quality requirements are met, and finally the real-time pressure monitoring of the wellbore and the wellhead is performed. In practical applications, the target object 13 can be a fallen fish or a cement plug. It should be noted that when the target object 13 is a cement plug, the method for re-entering the open hole described in this application specifically includes: after the ground operation personnel complete the disposal of the current production well, the drilling subsystem is lowered to the operating well to measure and control the borehole trajectory according to the non-magnetic source drilling guidance short section 8 and the drilling gyro short section 9. The well inclination and azimuth of the operating well are obtained by the gyro while drilling short section 9, and the non-magnetic source while drilling guide short section 8 measures the magnetic field signal of the current production well casing and the gravity field data of the operating well. The relative distance of the current production well casing is calculated according to the magnetic field signal strength, and the relative azimuth of the current production well casing is calculated according to the gravity field data. The spatial position coordinates of the current production well casing are inverted and calculated according to the operating well trajectory data, the relative distance and relative azimuth of the current production well casing. According to the spatial position of the current production well casing, the cement plug position is inverted and calculated in combination with the relative position of the target well cement plug and the current production well casing. The cement plug is positioned and the operating well is guided to test the cement plug. According to the calcium content in the returned rock cuttings, it is judged whether the test wellbore re-entry subsystem successfully tests the cement plug. If the positioning is not successful, according to the detection results of the non-magnetic source while drilling guide short section 8 and the gyro while drilling short section 9 in the test wellbore re-entry subsystem, the trajectory is continuously adjusted to continue to test the target well cement plug until the test is successful.

[0140] It should be noted that if Figure 6 As shown, if the trial wellbore re-entry system fails to successfully re-enter the target well, the trial wellbore re-entry subsystem continuously controls the wellbore trajectory to approach the trajectory of the target well, and drills a parallel well parallel to the trajectory of the target well; when the trial wellbore re-entry subsystem drills a parallel well parallel to the trajectory of the target well, the trial wellbore re-entry subsystem is taken out, casing is lowered and cemented, and a directional perforating tool is lowered to perform directional perforation of the parallel well to connect the parallel well with the target well; ultrafine cement is injected into the parallel well, and the ultrafine cement is squeezed into the target well through directional perforation to perform cement plugging of the target well; finally, annulus pressure monitoring equipment is installed to perform real-time pressure monitoring of the wellbore and wellhead.

[0141] The embodiment of the present application provides a method for reentering an open hole well, the method comprising: obtaining the spatial position coordinates of a target object in a target well through a trial wellbore reentry subsystem; performing a trial collision on the target object through the trial wellbore reentry subsystem according to the spatial position coordinates of the target object in the target well; changing the drilling angle of the trial wellbore reentry subsystem and re-drilling when the trial wellbore reentry subsystem touches the target object; monitoring whether at least one of the following occurs: a drilling tool is emptied, the drilling pressure continues to drop, and the instantaneous consumption of drilling fluid increases, and determining that the trial wellbore reentry subsystem reenters the target well when at least one of the following occurs: a drilling tool is emptied, the drilling pressure continues to drop, and the instantaneous consumption of drilling fluid increases. The present application uses the trial wellbore reentry subsystem to perform precise trial collision positioning on the target object according to the spatial position coordinates of the downhole target object, thereby ensuring smooth and stable reentry of the open hole well, and helping to improve the efficiency and quality of reentry of the open hole well.

[0142] In a third aspect of the present application, an electronic device 100 is provided. Figure 7 As shown, it includes a memory 110, a processor 120 and a computer program stored in the memory 110, and the processor 120 executes the computer program to implement the open hole well re-entry method described in the first aspect of the embodiment of the present application.

[0143] According to a fourth aspect of the embodiments of the present application, a computer-readable storage medium is provided, on which a computer program / instruction is stored. When the computer program / instruction is executed by a processor, the open hole well re-entry method as described in the first aspect of the embodiments of the present application is implemented.

[0144] Each embodiment in this specification focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other.

[0145] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the embodiments of the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0146] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0147] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0148] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0149] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0150] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0151] The above provides a detailed introduction to a method, system, electronic device and storage medium for re-entry into an open hole well. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for a person skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for re-entry into an open hole well, characterized in that: The method comprises: The spatial position coordinates of the target object in the target well are obtained by trial-hitting the wellbore reentry subsystem; According to the spatial position coordinates of the target object in the target well, the target object is tested by the test wellbore re-entry subsystem; When the trial wellbore re-entry subsystem touches the target object, the drilling angle of the trial wellbore re-entry subsystem is changed to re-drill; Monitor whether at least one of the following occurs: the drilling tool is emptied, the drilling pressure continues to drop, and the instantaneous consumption of drilling fluid increases. If at least one of the following occurs: the drilling tool is emptied, the drilling pressure continues to drop, and the instantaneous consumption of drilling fluid increases, determine that the trial wellbore re-entry subsystem re-enters the target well.

2. The open hole well re-entry method according to claim 1, characterized in that: After determining that the trial wellbore re-entry subsystem re-enters the target well, the method further includes: Controlling the trial wellbore re-entry subsystem to stop drilling, and withdrawing the trial wellbore re-entry subsystem from the operating well; The probing and reaming subsystem is lowered into the working well, and the wellbore drilled by the trial wellbore re-entry subsystem is reamed by the probing and reaming subsystem.

3. The open hole re-entry method according to claim 1 or 2, characterized in that: After the trial wellbore re-entry subsystem touches the target object, the method further includes: Controlling the trial wellbore re-entry subsystem to stop drilling, and withdrawing the trial wellbore re-entry subsystem from the operating well; A cement plug is injected into the first target well section in the working well to backfill the working well.

4. The open hole re-entry method according to claim 1, characterized in that: In the case where the target object is a fallen fish, the step of obtaining the spatial position coordinates of the target object in the target well by the trial-hit wellbore reentry subsystem includes: The trajectory data, gravity field data and magnetic field signal of the fish falling in the working well are measured by the trial wellbore re-entry subsystem; Determine a first relative distance between the fish landing and the trial wellbore re-entry subsystem according to the magnetic field signal, and determine a first relative orientation between the fish landing and the trial wellbore re-entry subsystem according to the gravity field data; The spatial position coordinates of the fallen fish are determined according to the first relative distance, the first relative orientation and the trajectory data.

5. The open hole re-entry method according to claim 1, characterized in that: In the case where the target object is a cement plug, the step of obtaining the spatial position coordinates of the target object in the target well by the trial wellbore reentry subsystem includes: The trajectory data and gravity field data of the operating well and the casing magnetic field signal in the target well are measured by the trial wellbore re-entry subsystem; Determine a second relative distance between the casing and the trial borehole re-entry subsystem according to the magnetic field signal, and determine a second relative orientation between the fish and the trial borehole re-entry subsystem according to the gravity field data; determining the spatial position coordinates of the casing according to the second relative distance, the second relative orientation and the trajectory data; The spatial position coordinates of the cement plug are determined according to the spatial position coordinates of the casing and based on the pre-stored relative position of the casing and the cement plug.

6. The open hole re-entry method according to claim 4 or 5, characterized in that: The method further comprises: In the case that any one of the drilling tool emptying, the continuous decrease of the drilling pressure, and the increase of the instantaneous consumption of the drilling fluid is not detected, the trial wellbore re-entry subsystem is controlled to drill along a trajectory parallel to the target well to obtain a parallel well parallel to the trajectory of the target well; Directed perforating is performed on the parallel wells to connect the target well with the parallel wells; Ultrafine cement is injected into the parallel wells, so that the ultrafine cement flows from the parallel wells into the target well through the perforation channels of the target well and the parallel wells.

7. The open hole re-entry method according to claim 2, characterized in that: After the wellbore drilled by the trial wellbore re-entry subsystem is enlarged by the probing and enlarging subsystem, the method further comprises: Controlling the drilling and reaming subsystem to stop drilling, and withdrawing the drilling and reaming subsystem from the operating well; A casing is run into the working well and cementing is performed.

8. An open hole re-entry system for implementing the method according to any one of claims 1 to 7, characterized in that: The system comprises: a trial wellbore re-entry subsystem; The trial borehole re-entry subsystem comprises: a first drill pipe, a first non-magnetic drill collar, a non-magnetic source while drilling steering subsection, a while drilling gyro subsection, a first while drilling measurement subsection, a power drilling tool and a first drill bit connected in sequence.

9. The open hole re-entry system according to claim 8, characterized in that: The system also includes: a punching and reaming subsystem; The percussion and reaming subsystem comprises: a second drill pipe, a second non-magnetic drill collar, a second measurement while drilling short section, a third non-magnetic drill collar, a stabilizer, a check valve, a screw drill tool and a second drill bit which are connected in sequence.

10. The open hole re-entry system according to claim 9, characterized in that: The system further comprises: a surface injection control subsystem; The surface injection control subsystem comprises: an onshore injection vehicle, an instrument panel, an injection device, an onshore drilling platform and a derrick injection head which are connected in sequence.

11. An electronic device comprising a memory, a processor and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the open hole re-entry method according to any one of claims 1 to 7.

12. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the open hole re-entry method according to any one of claims 1 to 7 is implemented.

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